Reasonably select planetary reducers to achieve efficient and stable operation
Planetary reducers are generally used for low-speed and high torque transmission equipment. By using gears with fewer gears on the input shaft, the high-speed power of the reduction motor is meshed with the large gears on the output shaft to achieve the purpose of reduction. How to choose the appropriate planetary reducer and reduction ratio is a crucial issue.

Calculation method of reduction ratio

The calculation formula is: i=n1/n2， Where n1 is the input speed and n2 is the output speed

The reduction ratio refers to the ratio of the instantaneous input speed to the output speed in the gearbox mechanism, usually represented by the symbol i. For example, if the input speed is 2000r/min and the output speed is 20r/min, then the reduction ratio is: i=2000/20=100: 1. Its reduction ratio is 100:1.

Calculation method for gear system

The calculation method is: i=Z2/Z1

The calculation method for the reduction ratio of a gear system is determined by the ratio between the number of teeth of the driven gear and the number of teeth of the driving gear i=Z2/Z1， Among them, Z1 is the number of teeth on the driven gear, and Z2 is the number of teeth on the driving gear. If it is a multi-stage gear reduction, it is necessary to divide the number of teeth on the driven gear by the number of teeth on all meshing pairs of gears, and then take the minimum value as the reduction ratio.

Calculation method for reduction ratio of belts, friction wheels, and chains

The calculation method is: driven wheel diameter/driven wheel diameter

The reduction ratio is determined by the meshing of large and small gears to output speed, with multi-stage gear meshing resulting in a lower reduction ratio and greater torque. The reduction ratio is represented by the symbol "i". For example, if the reduction ratio is 1/64, if the stepper motor outputs a torque of 1 Nm, the output torque converted by the gearbox will be 64 Nm. Of course, the speed will decrease to 1/64 of the original speed. For example, a reduction ratio of 1:100 means that the speed of the electric motor (motor) is 100 rpm, and the output spindle is 1 rpm.

General calculation method

The calculation method is: using torque ÷ 9550 ÷ motor power × motor power input speed ÷ usage coefficient.

The requirements for planetary gearboxes vary in different application scenarios.

For example, when the output torque is average, for mechanical equipment with high precision requirements, it is necessary to choose a planetary gearbox with a smaller reduction ratio.

For situations with high torque requirements and average accuracy, it is necessary to use planetary reducers with larger deceleration ratios to increase output torque.